8212678: Windows IME related patch

Reviewed-by: andrew
Backport-of: 60613c5fbc2554cbbf09d79804de276b9c2d786c

Author: Takuya Kiriyama

jdk/src/windows/classes/sun/awt/windows/WInputMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -62,6 +62,7 @@ final class WInputMethod extends InputMethodAdapter
     private Locale currentLocale;
     // indicate whether status window is hidden or not.
     private boolean statusWindowHidden = false;
+    private boolean hasCompositionString = false;
 
     // attribute definition in Win32 (in IMM.H)
     public final static byte ATTR_INPUT                 = 0x00;
@@ -241,6 +242,7 @@ else if (subset1 == InputSubset.FULLWIDTH_LATIN)
         } else if (locale.getLanguage().equals(Locale.KOREAN.getLanguage())) {
             if (subset1 == UnicodeBlock.BASIC_LATIN || subset1 == InputSubset.LATIN_DIGITS) {
                 setOpenStatus(context, false);
+                setConversionStatus(context, IME_CMODE_ALPHANUMERIC);
             } else {
                 if (subset1 == UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
                     || subset1 == InputSubset.HANJA
@@ -258,11 +260,14 @@ else if (subset1 == InputSubset.FULLWIDTH_LATIN)
         } else if (locale.getLanguage().equals(Locale.CHINESE.getLanguage())) {
             if (subset1 == UnicodeBlock.BASIC_LATIN || subset1 == InputSubset.LATIN_DIGITS) {
                 setOpenStatus(context, false);
+                newmode = getConversionStatus(context);
+                newmode &= ~IME_CMODE_FULLSHAPE;
+                setConversionStatus(context, newmode);
             } else {
                 if (subset1 == UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
                     || subset1 == InputSubset.TRADITIONAL_HANZI
                     || subset1 == InputSubset.SIMPLIFIED_HANZI)
-                    newmode = IME_CMODE_NATIVE;
+                    newmode = IME_CMODE_NATIVE | IME_CMODE_FULLSHAPE;
                 else if (subset1 == InputSubset.FULLWIDTH_LATIN)
                     newmode = IME_CMODE_FULLSHAPE;
                 else
@@ -313,6 +318,15 @@ public void activate() {
             setLocale(currentLocale, true);
         }
 
+        // Compare IM's composition string with Java's composition string
+        if (hasCompositionString && !isCompositionStringAvailable(context)) {
+            endCompositionNative(context, DISCARD_INPUT);
+            sendInputMethodEvent(InputMethodEvent.INPUT_METHOD_TEXT_CHANGED,
+                EventQueue.getMostRecentEventTime(),
+                null, null, null, null, null, 0, 0, 0);
+            hasCompositionString = false;
+        }
+
         /* If the status window or Windows language bar is turned off due to
            native input method was switched to java input method, we
            have to turn it on otherwise it is gone for good until next time
@@ -340,6 +354,7 @@ public void deactivate(boolean isTemporary)
             isLastFocussedActiveClient = haveActiveClient();
         }
         isActive = false;
+        hasCompositionString = isCompositionStringAvailable(context);
     }
 
     /**
@@ -644,4 +659,5 @@ private WComponentPeer getNearestNativePeer(Component comp)
     static native Locale getNativeLocale();
     static native boolean setNativeLocale(String localeName, boolean onActivate);
     private native void openCandidateWindow(WComponentPeer peer, int x, int y);
+    private native boolean isCompositionStringAvailable(int context);
 }

jdk/src/windows/native/sun/windows/awt_Component.cpp

@@ -3832,6 +3832,11 @@ void AwtComponent::SetCompositionWindow(RECT& r)
         return;
     }
     COMPOSITIONFORM cf = {CFS_DEFAULT, {0, 0}, {0, 0, 0, 0}};
+    LOGFONT lf;
+    HFONT hFont = (HFONT) GetStockObject(DEFAULT_GUI_FONT);
+    if (GetObject(hFont, sizeof(lf), (LPVOID)&lf) == sizeof(lf)) {
+        ImmSetCompositionFont(hIMC, &lf);
+    }
     ImmSetCompositionWindow(hIMC, &cf);
     ImmReleaseContext(hwnd, hIMC);
 }

jdk/src/windows/native/sun/windows/awt_InputMethod.cpp

@@ -528,6 +528,23 @@ JNIEXPORT jobjectArray JNICALL Java_sun_awt_windows_WInputMethodDescriptor_getNa
     CATCH_BAD_ALLOC_RET(NULL);
 }
 
+/*
+ * Class:     sun_awt_windows_WInputMethod
+ * Method:    isCompositionStringAvailable
+ * Signature: (I)Z
+ */
+JNIEXPORT jboolean JNICALL Java_sun_awt_windows_WInputMethod_isCompositionStringAvailable
+  (JNIEnv *env, jobject self, jint context)
+{
+    LONG length;
+    length = ImmGetCompositionString((HIMC)IntToPtr(context), GCS_COMPSTR, NULL, 0);
+    if (length > 0) {
+        return JNI_TRUE;
+    } else {
+        return JNI_FALSE;
+    }
+}
+
 /**
  * Class:     sun_awt_windows_WInputMethod
  * Method:    getNativeIMMDescription